Adrian confesses that one evening he made a large batch of pumpkin soup that was perfectly nice but just a bit boring, so he came up with this idea of adding a big splash of flavour to the soup by means of a raviolo filled with pesto.
Well ahead, make the basil pesto ravioli: mix the flour, whole egg, salt and oil in a blender, and then bring together with some cold water (2–3 spoonfuls at the most) to form a coherent dough. Knead for about 10 minutes until smooth, then wrap in foil or plastic wrap and leave to rest in the fridge for about 1 hour.